Displacement control system of electronic tensile machine

Abstract

The utility model provides a displacement control system of an electronic tensile machine. Comprising an intelligent operation interface, a control unit, a servo driving unit, a test action execution mechanism and an absolute displacement sensor. The intelligent operation interface is used for receiving a displacement target and a tensile machine action input by a user; the control unit is connected with the intelligent operation interface and used for receiving the displacement target and the tensile machine action, generating a motion instruction according to the tensile machine action and sending the motion instruction to the servo driving unit. The servo driving unit is mechanically connected with the test action executing mechanism, and the servo driving unit receives the motion instruction to work so as to drive the test action executing mechanism to move; the absolute displacement sensor is connected with the servo driving unit and is used for measuring the motion displacement of the electronic tensile machine in real time; and the control unit is electrically connected with the servo driving unit to obtain the motion displacement, and stops sending the motion instruction when the motion displacement is equal to the displacement target. Accurate displacement control of the electric tensile machine can be improved.

Description

Technical Field

[0001] This application relates to the field of electronic tensile testing machine technology, and in particular to a displacement control system for an electronic tensile testing machine. Background Technology

[0002] An electronic tensile testing machine is a device used to measure the tensile properties of materials. It can perform tests such as tension, compression, and bending on materials. It can measure the load and displacement of the tested material to obtain the material's mechanical property parameters, and therefore has wide applications in materials research, quality control, and engineering design.

[0003] Currently, traditional electronic tensile testing machines typically use incremental displacement sensors to acquire displacement data. However, these sensors rely on initial settings and are prone to accumulating errors or requiring zeroing during use. This undoubtedly makes accurate displacement control impossible for electronic tensile testing machines. Utility Model Content

[0004] To improve the accurate control of displacement by an electric tensile testing machine, this application provides a displacement control system for an electronic tensile testing machine.

[0005] A displacement control system for an electronic tensile testing machine, the system comprising an intelligent operating interface, a control unit, a servo drive unit, a test action execution mechanism, and an absolute displacement sensor; wherein,

[0006] The intelligent operating interface is used to receive the displacement target and tensile machine action input by the user;

[0007] The control unit is electrically connected to the intelligent operating interface and is used to receive the unique target and the action of the tensile testing machine, generate motion commands based on the action of the tensile testing machine, and send them to the servo drive unit.

[0008] The servo drive unit is electrically connected to the control unit and mechanically connected to the test action execution mechanism. The servo drive unit receives the motion command and then works to drive the test action execution mechanism to move.

[0009] The absolute displacement sensor is electrically connected to the servo drive unit and is used to measure the motion displacement of the electronic tensile testing machine in real time.

[0010] The control unit also acquires the motion displacement through an electrical connection with the servo drive unit, and stops sending motion commands when the motion displacement is equal to the difference between the displacement target and the preset initial displacement.

[0011] By adopting the above technical solution, an absolute encoder is used to measure the motion displacement of the electronic tensile testing machine, and the control unit obtains the motion displacement. The obtained motion displacement is used as the source of absolute displacement data. The acquired displacement data no longer needs to obtain the zero point through an external switch origin, which can reduce the cumulative error caused by long-term use, improve the data consistency at the same position, and ensure the accuracy and stability of the displacement data.

[0012] Preferably, the absolute displacement sensor is a multi-turn absolute displacement sensor.

[0013] By adopting the above technical solution, the motion displacement of the electronic tensile testing machine can be measured using a multi-turn absolute encoder, which is no longer limited to the range of a single turn, thus making the measurement range larger.

[0014] Preferably, the system further includes a power supply module, wherein the power supply module is electrically connected to the intelligent operating interface through a first transformer to provide 220V power to the intelligent operating interface;

[0015] The power supply module is electrically connected to the control unit through a second transformer to provide 24V power to the control unit;

[0016] The power supply module is electrically connected to the servo drive unit through a third transformer to provide 280V power to the servo drive unit.

[0017] By adopting the above technical solution, the system provides the corresponding power supply voltage to the intelligent operation interface, control unit and servo drive unit through its built-in power supply module, ensuring that the intelligent operation interface, control unit and servo drive unit can work stably.

[0018] Preferably, the power supply module includes a battery adapter or a power adapter.

[0019] By adopting the above technical solution, the power supply module can provide a stable current output for the intelligent operating interface, control unit and servo drive unit.

[0020] Preferably, the system further includes a temperature detection module; wherein,

[0021] The temperature detection module is electrically connected to the control unit. The temperature detection module is used to measure the temperature value of the electronic tensile testing machine and send the temperature value to the control unit.

[0022] The control unit determines whether the temperature value is greater than the preset temperature value. If it is greater, it generates a displacement increase signal, closes the displacement increase circuit to output an increased displacement, and adds the increased displacement to the displacement target to replace the original displacement target.

[0023] If the displacement is not greater than the specified value, a displacement holding signal is generated to disconnect the displacement increasing circuit and determine the displacement target as the displacement target.

[0024] By adopting the above technical solution, the temperature of the electronic tensile testing machine is obtained through a temperature detection module. Considering that high temperature will cause deformation of the electronic tensile testing machine, in order to ensure that the experimental action actuator can accurately reach the working position, the deformation of the electronic tensile testing machine is taken into account to fine-tune the displacement target and further improve the accurate control of displacement by the electric tensile testing machine.

[0025] Preferably, the multi-turn absolute displacement sensor includes a battery-powered unit.

[0026] By adopting the above technical solution, the displacement data before the power outage can still be saved after the system is powered off, avoiding the need for zeroing calibration after each restart, reducing the error caused by zeroing calibration, and ensuring the accuracy of displacement data in the electronic tensile testing machine.

[0027] Preferably, the intelligent operating interface also receives the motion trajectory obtained by the control unit and presents the motion displacement.

[0028] By adopting the above technical solution, the test progress can be displayed in real time through an intelligent operating interface, making it easy to understand the progress intuitively and clearly.

[0029] Preferably, the control unit includes I / O input / output ports, which are embedded in the control unit via optocoupler isolation chips. The electrical connection between the control unit and the intelligent operating interface includes:

[0030] The intelligent operating interface is electrically connected to the I / O input / output port of the control unit via a communication unit.

[0031] By adopting the above technical solution, the control unit interacts with data through the IO input port, and the IO input / output port is embedded in the control unit through an optocoupler isolation chip, which can reduce the coupling caused by data interaction through the IO input / output port, thereby reducing the occurrence of data changes.

[0032] Preferably, the control unit further includes a pulse input / output port, and the electrical connection between the servo drive unit and the control unit includes the connection between the servo drive unit and the I / O input / output port of the control unit, and the connection between the servo drive unit and the pulse input / output port of the control unit; wherein,

[0033] The control unit sends the motion command to the servo drive unit through the pulse input / output port;

[0034] The control unit receives the motion displacement through the I / O input / output port.

[0035] By adopting the above technical solution, the interaction between the control unit and the servo drive unit will be conducted through different ports for commands and data. This will reduce the occurrence of data or command waiting during the interaction process, enabling the servo drive unit and the control unit to respond in real time.

[0036] Preferably, the servo drive unit includes a motor encoder interface, wherein the servo drive unit electrically connects the absolute displacement sensor to the servo drive unit through the encoder interface.

[0037] By adopting the above technical solution, the absolute displacement sensor and the servo drive unit can interact through the motor encoder interface, and the servo drive unit can then interact with the control unit through the IO input / output port. By using different ports for data interaction, the real-time displacement data obtained by the control unit can be guaranteed.

[0038] The displacement control system for an electronic tensile testing machine provided by this utility model has the following advantages compared to the prior art:

[0039] 1. An absolute encoder is used to measure the motion displacement of the electronic tensile testing machine and enable the control unit to obtain the motion displacement. The obtained motion displacement is used as the source of absolute displacement data. The acquired displacement data no longer needs to obtain the zero point through an external switch origin, which can reduce the cumulative error caused by long-term use, improve the data consistency at the same position, and ensure the accuracy and stability of displacement data.

[0040] 2. By using a multi-turn absolute displacement sensor with a battery-powered unit, the displacement data before the power outage can still be saved after the system is powered off. This avoids the need for zeroing calibration after each restart, reduces the error caused by zeroing calibration, and ensures the accuracy of displacement data in the electronic tensile testing machine. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a displacement control system for an electronic tensile testing machine provided in Embodiment 1 of this application.

[0042] Figure 2 This is a schematic diagram of the ports included in the control unit provided in the embodiments of this application.

[0043] Figure 3 This is a schematic diagram of the absolute displacement sensor structure provided in the embodiments of this application.

[0044] Figure 4 This is a schematic diagram of a displacement control system for an electronic tensile testing machine provided in Embodiment 2 of this application.

[0045] Figure 5This is a schematic diagram of the power supply module structure provided in the embodiment of this application.

[0046] Figure 6 This is a schematic diagram of a displacement control system for an electronic tensile testing machine provided in Embodiment 3 of this application.

[0047] Figure label:

[0048] 1. Intelligent operation interface; 2. Control unit; 21. IO input / output port; 211. IN input port; 212. OUT output port; 22. Pulse input / output port; 221. Pulse input port; 222. Pulse output port; 3. Servo drive unit; 31. Motor encoder interface; 4. Test action execution mechanism; 5. Absolute displacement sensor; 51. Battery power supply unit; 6. Power supply module; 61. Battery adapter; 62. Power adapter; 7. Temperature detection module.

[0049] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0052] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0053] Example 1

[0054] Embodiment 1 of this application discloses a displacement control system for an electronic tensile testing machine. Figure 1 This is a schematic diagram of a displacement control system for an electronic tensile testing machine provided in Embodiment 1 of this application. Figure 1As shown, a displacement control system for an electronic tensile testing machine includes an intelligent operating interface 1, a control unit 2, a servo drive unit 3, a test action execution mechanism 4, and an absolute displacement sensor 5. The control unit 2 is connected to the intelligent operating interface 1 and the servo drive unit 3, and the servo drive unit 3 is also connected to the test action execution mechanism 4 and the absolute displacement sensor 5. Specifically, the intelligent operating interface 1 is electrically connected to the control unit 2, the control unit 2 is electrically connected to the servo drive unit 3, the absolute displacement sensor 5 is electrically connected to the servo drive unit 3, and the servo drive unit 3 is mechanically connected to the test action execution mechanism 4.

[0055] The intelligent operation interface 1 is used to receive the displacement target and tensile machine action input by the user. Specifically, the intelligent operation interface 1 can be a touchscreen or a computer terminal. The user can set the displacement target and tensile machine action by operating the touchscreen or computer terminal, thereby enabling the intelligent operation interface 1 to receive the user-input displacement target and tensile machine action. The displacement target refers to the displacement value that the test action actuator needs to move. The electronic tensile machine is placed vertically, causing the test action actuator 4 to move vertically upwards or downwards. The tensile machine action refers to whether the test action actuator 4 needs to move vertically upwards or downwards.

[0056] After obtaining the displacement target and the tensile machine action, the intelligent operation interface 1 sends the displacement target and the tensile machine action to the control unit 2. Figure 2 This is a schematic diagram of the ports included in the control unit provided in the embodiments of this application, such as... Figure 2 As shown, the control unit 2 includes an I / O input / output port 21 and a pulse input / output port 22. The I / O input / output port 21 includes an IN input port 211 and an OUT output port 212. The pulse input / output port 22 includes a pulse input port 221 and a pulse output port 222.

[0057] The intelligent operation interface 1 is connected to the IN input port 211 of the control unit 2 via a communication unit, thereby achieving an electrical connection between the intelligent operation interface 1 and the IO input / output port 21 of the control unit 2 through the communication unit. Specifically, the communication unit can be any one of RS485, W5500, and SN65HVD3082EDR. After acquiring the displacement target and the tension machine's movement, the intelligent operation interface 1 sends the displacement target and tension machine movement to the IN input port 211 of the control unit 2 via the communication unit, enabling the control unit 2 to receive the displacement target and tension machine movement.

[0058] The IO input / output port 21 is embedded in the control unit 2 through an optocoupler isolation chip. In this way, the control unit 2 interacts with data through the IN input port 211. The IO input / output port 21 is embedded in the control unit through the optocoupler isolation chip, which can reduce the coupling caused by data interaction through the IO input / output port 21, thereby reducing the occurrence of data changes and improving data accuracy.

[0059] Subsequently, after receiving the displacement target and the movement of the tension machine, control unit 2 generates a motion command based on the movement of the tension machine. Specifically, it generates a motion command corresponding to the pulse direction based on whether the tension machine is moving vertically downwards or vertically upwards. If the tension machine is moving vertically downwards, the motion command is a high voltage; if the tension machine is moving vertically upwards, the motion command is a low voltage.

[0060] The servo drive unit 3 is electrically connected to the control unit 2, including the connection between the servo drive unit 3 and the I / O input / output port 21 of the control unit 2. After generating motion commands, the control unit 2 sends the generated motion commands to the servo drive unit 3 according to the connection with the servo drive unit 3. Specifically, the control unit 2 sends the generated motion commands to the servo drive unit 3 through the pulse output port 222, so that the servo drive unit 3 receives the motion commands. That is, the control unit 2 sends the motion commands to the servo drive unit 3 through the pulse input / output port.

[0061] The servo drive unit 3 is mechanically connected to the test action execution mechanism 4, so that when the servo drive unit receives a motion command and works, it can drive the test action execution mechanism 4 to move, so that the electronic tensile testing machine can test the material.

[0062] In addition, the absolute displacement sensor 5 is electrically connected to the servo drive unit 3 to measure the motion displacement of the electronic tensile testing machine in real time. Specifically, the motion displacement refers to the displacement value of the test action actuator 4. The servo drive unit 3 includes a motor encoder interface 31, through which the absolute displacement sensor 5 is electrically connected to the servo drive unit 3, enabling the servo drive unit 3 to acquire the motion displacement. Furthermore, through the electrical connection between the servo drive unit 3 and the control unit 2, the motion displacement is sent to the control unit 2, allowing the control unit 2 to acquire the motion displacement.

[0063] Specifically, control unit 2 receives motion displacement through I / O input / output port 21. That is, after servo drive unit 3 obtains the motion displacement, it sends it to IN input port 211 in control unit 2, enabling control unit 2 to receive the motion displacement. This achieves data interaction between the absolute displacement sensor and the servo drive unit through the motor encoder interface. The servo drive unit then interacts with the control unit through the I / O input / output port. By using different ports for commands and data exchange between the control unit and the servo drive unit, the occurrence of data or command waiting during interaction is reduced, allowing the servo drive unit and control unit to respond in real time and ensuring the real-time nature of the displacement data received by the control unit.

[0064] Preferably, the absolute displacement sensor 5 is a multi-turn absolute displacement sensor. This allows for measurement of the motion displacement of the electronic tensile testing machine not only within a single turn, but also provides a wider measurement range.

[0065] After the control unit 2 obtains the motion displacement through its electrical connection with the servo drive unit 3, it sends the motion displacement and the target displacement as input signals to the comparator circuit. When the motion displacement is less than the target displacement, the comparator circuit outputs a low-voltage hold command to keep the switch that is currently sending the motion command closed, allowing the servo drive unit 3 to continue receiving motion commands and driving the test action actuator 4 to move, thus continuing to generate displacement. When the motion displacement is no longer less than the target displacement, i.e., when the motion displacement equals the target displacement, the comparator circuit outputs a high-voltage cut-off command to open the switch that is currently sending the motion command, causing the control unit 2 to stop sending motion commands. The servo drive unit 3 no longer receives motion commands and cannot drive the test action actuator 4, thus ceasing to generate displacement. At this point, the displacement control of the electronic tensile testing machine is complete. This method uses an absolute encoder to measure the motion displacement of the electronic tensile testing machine and provides the control unit with the motion displacement. Using this motion displacement as the source of absolute displacement data eliminates the need to obtain the zero point through an external switch origin, reducing accumulated errors over long-term use, improving data consistency at the same position, and ensuring the accuracy and stability of the displacement data.

[0066] Preferably, the intelligent operation interface 1 also receives the motion displacement from the control unit 2 and displays the motion displacement. This allows the test progress to be displayed in real time through the intelligent operation interface, providing a clear and intuitive understanding of the progress.

[0067] Figure 3 This is a schematic diagram of the absolute displacement sensor structure provided in an embodiment of this application. Figure 3As shown, the absolute displacement sensor 5 includes a battery-powered unit 51. That is, the multi-turn absolute displacement sensor includes a battery-powered unit, so that even after the system is powered off, the displacement data before the power outage can still be saved, avoiding the need for zeroing calibration after each restart, reducing errors caused by zeroing calibration, and ensuring the accuracy of displacement data during testing by the electronic tensile testing machine.

[0068] Example 2

[0069] In Embodiment Two, another displacement control system for an electronic tensile testing machine is disclosed. The difference between this system and the one in Embodiment One is that the system in Embodiment Two also includes a power supply module. Figure 4 This is a schematic diagram of a displacement control system for an electronic tensile testing machine provided in Embodiment 2 of this application. Figure 4 As shown, a displacement control system for an electronic tensile testing machine includes an intelligent operating interface 1, a control unit 2, a servo drive unit 3, a test action execution mechanism 4, an absolute displacement sensor 5, and a power supply module 6. The control unit 2 is connected to the intelligent operating interface 1 and the servo drive unit 3. The servo drive unit 3 is also connected to the test action execution mechanism 4 and the absolute displacement sensor 5. The power supply module 6 is connected to the intelligent operating interface 1, the control unit 2, and the servo drive unit 3. Specifically, the intelligent operating interface 1 is electrically connected to the control unit 2, the control unit 2 is electrically connected to the servo drive unit 3, the absolute displacement sensor 5 is electrically connected to the servo drive unit 3, and the servo drive unit 3 is mechanically connected to the test action execution mechanism 4. The connections of the power supply module 6 to the control unit 2, the servo drive unit 3, and the absolute displacement sensor 5 are all electrical connections.

[0070] The power supply module 6 is electrically connected to the intelligent operating interface 1 via a first transformer to provide 220V power. The power supply module 6 is also electrically connected to the control unit 2 via a second transformer to provide 24V power. Finally, the power supply module 6 is electrically connected to the servo drive unit 3 via a third transformer to provide 380V power. In this way, the system uses its built-in power supply modules to provide the corresponding power voltages to the intelligent operating interface, control unit, and servo drive unit, ensuring stable operation of these components.

[0071] Preferred, Figure 5 This is a schematic diagram of the power supply module structure provided in an embodiment of this application. Figure 5 As shown, the power supply module 6 includes a battery adapter 61 or a power adapter 62. This enables the power supply module 6 to provide a stable current output to the intelligent operating interface 1, the control unit 2, and the servo drive unit 3.

[0072] Example 3

[0073] In Embodiment 3, another displacement control system for an electronic tensile testing machine is disclosed. The difference between this system and the one in Embodiment 1 is that the system in Embodiment 3 also includes a power supply module. Figure 6 This is a schematic diagram of a displacement control system for an electronic tensile testing machine provided in Embodiment 3 of this application. Figure 6 As shown, a displacement control system for an electronic tensile testing machine includes an intelligent operating interface 1, a control unit 2, a servo drive unit 3, a test action execution mechanism 4, an absolute displacement sensor 5, and a temperature detection module 7. The control unit 2 is connected to the intelligent operating interface 1 and the servo drive unit 3. The servo drive unit 3 is also connected to the test action execution mechanism 4 and the absolute displacement sensor 5. The temperature detection module 7 is connected to the control unit 2. Specifically, the intelligent operating interface 1 is electrically connected to the control unit 2, the control unit 2 is electrically connected to the servo drive unit 3, the absolute displacement sensor 5 is electrically connected to the servo drive unit 3, and the servo drive unit 3 is mechanically connected to the test action execution mechanism 4. The temperature detection module 7 is electrically connected to the control unit 2.

[0074] The temperature detection module 7 is electrically connected to the control unit 2. The temperature detection module 7 is used to measure the temperature value of the electronic tensile testing machine and send the temperature value to the control unit 2. The control unit 2 determines whether the temperature value is greater than the preset temperature. If it is greater, it generates a displacement increase signal to close the displacement increase circuit and output the increased displacement, replacing the original displacement target with the increased displacement and the displacement target camera. If it is not greater, it generates a displacement hold signal to open the displacement increase circuit and determine the displacement target as the displacement target.

[0075] Specifically, the temperature detection module 7 can be placed in areas of the electronic tensile testing machine that are susceptible to significant deformation due to temperature variations. The temperature detection module 7 detects the temperature value of the electronic tensile testing machine and then sends this temperature value to the I / O input / output port 21 of the control unit 2. The control unit 2 receives the temperature value and then sends it to one input of the comparator in the comparison circuit. The other input of the comparator is connected to a preset temperature. If the temperature value exceeds the preset temperature, the comparator outputs a high-level displacement increase signal. The output of the comparator is connected to the displacement increase circuit, causing the displacement increase circuit to close and output an increased displacement. Finally, the increased displacement and the target displacement are used as input signals to an adder, which then outputs the latest target displacement.

[0076] If the temperature value is not greater than the preset temperature, the comparator outputs a low-level displacement increase signal. The output of the comparator is connected to the displacement increase circuit, which disconnects the displacement increase circuit. The displacement increase circuit does not output any displacement increase, and the adder only has the displacement target as its input signal. Therefore, the final output signal of the adder is the displacement target, which is the displacement target.

[0077] Specifically, the displacement increase circuit is a device that outputs a fixed value, which is determined based on numerous experiments to account for the deformation caused by the electronic tensile testing machine. The temperature of the electronic tensile testing machine is then monitored by a temperature detection module. Considering that high temperatures can cause deformation, this deformation is taken into account to ensure the experimental actuator accurately reaches the working position. This allows for fine-tuning of the displacement target and further improves the accuracy of displacement control by the electric tensile testing machine.

[0078] Example 4

[0079] Another displacement control system for an electronic tensile testing machine is disclosed in Embodiment 4. The difference between this system and the electronic tensile testing machine displacement control system in Embodiment 2 is that the system in Embodiment 3 also includes a power supply module. Further details will not be provided here.

[0080] The implementation principle is as follows:

[0081] The intelligent operating interface receives the user-input displacement target and tensile machine action. It then sends these parameters to the control unit via an electrical connection. The control unit generates motion commands based on the received tensile machine actions and sends these commands to the servo drive unit, causing it to operate and move the test action actuator. Simultaneously, an absolute displacement sensor is electrically connected to the servo drive unit to measure the electronic tensile machine's displacement in real time. The control unit also acquires the displacement through its connection to the servo drive unit and stops sending motion commands when the displacement equals the displacement target. This method of using an absolute encoder to measure the electronic tensile machine's displacement and providing the control unit with this displacement as the absolute displacement data source eliminates the need for an external switch origin to obtain the zero point. This reduces accumulated errors over long-term use, improves data consistency at the same location, and ensures the accuracy and stability of the displacement data.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A displacement control system for an electronic tensile testing machine, characterized in that, The system includes: an intelligent operating interface (1), a control unit (2), a servo drive unit (3), a test action execution mechanism (4), and an absolute displacement sensor (5); wherein, The intelligent operation interface (1) is used to receive the displacement target and tensile machine action input by the user; The control unit (2) is electrically connected to the intelligent operation interface (1) to receive the displacement target and the action of the tension machine, generate motion commands according to the action of the tension machine, and send them to the servo drive unit (3). The servo drive unit (3) is electrically connected to the control unit (2) and mechanically connected to the test action execution mechanism. The servo drive unit (3) receives the motion command to work and drive the test action execution mechanism (4) to move. The absolute displacement sensor (5) is electrically connected to the servo drive unit (3) and is used to measure the motion displacement of the electronic tensile testing machine in real time. The control unit (2) also acquires the motion displacement through an electrical connection with the servo drive unit (3), and stops sending motion commands when the motion displacement is equal to the displacement target.

2. The system according to claim 1, characterized in that, The absolute displacement sensor (5) is a multi-turn absolute displacement sensor.

3. The system according to claim 1, characterized in that, The system also includes a power supply module (6), wherein the power supply module (6) is electrically connected to the intelligent operation interface through a first transformer to provide 220V power to the intelligent operation interface (1); The power supply module (6) is electrically connected to the control unit through the second transformer to provide 24V power to the control unit (2); The power supply module (6) is electrically connected to the servo drive unit through the third transformer to provide 380V power to the servo drive unit (3).

4. The system according to claim 3, characterized in that, The power supply module (6) includes a battery adapter (61) or a power adapter (62).

5. The system according to claim 3, characterized in that, The system also includes a temperature detection module (7); wherein, The temperature detection module (7) is electrically connected to the control unit (2). The temperature detection module (7) is used to measure the temperature value of the electronic tensile testing machine and send the temperature value to the control unit (2). The control unit (2) determines whether the temperature value is greater than the preset temperature. If it is greater, it generates a displacement increase signal, closes the displacement increase circuit to output the increased displacement, and adds the increased displacement to the displacement target to replace the original displacement target. If the displacement is not greater than the specified value, a displacement holding signal is generated to disconnect the displacement increasing circuit and determine the displacement target as the displacement target.

6. The system according to claim 2, characterized in that, The multi-turn absolute displacement sensor includes a battery-powered unit.

7. The system according to claim 1, characterized in that, The intelligent operation interface (1) also receives the motion displacement obtained by the control unit and presents the motion displacement.

8. The system according to claim 7, characterized in that, The control unit (2) includes an I / O input / output port (21), which is embedded in the control unit (2) through an optocoupler isolation chip. The control unit (2) is electrically connected to the intelligent operating interface (1) in the following ways: The intelligent operation interface (1) is electrically connected to the IO input / output port (21) of the control unit (2) through the communication unit.

9. The system according to claim 8, characterized in that, The control unit (2) further includes a pulse input / output port (22). The servo drive unit (3) is electrically connected to the control unit (2) by connecting the servo drive unit (3) to the IO input / output port (21) of the control unit (2) and to the pulse input / output port (22) of the control unit (2). The control unit (2) sends the motion command to the servo drive unit (3) through the pulse input / output port (22). The control unit (2) receives the motion displacement through the IO input / output port (21).

10. The system according to claim 1, characterized in that, The servo drive unit (3) includes a motor encoder interface (31), wherein the servo drive unit (3) realizes the electrical connection between the absolute displacement sensor (5) and the servo drive unit (3) through the motor encoder interface (31).

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